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Difficulty: MediumSwitching Concepts and VLANs

A network administrator is documenting Layer 2 switch interface behaviors and VLAN features for an enterprise network deployment. Match each switching concept on the left with its correct operational description on the right.

  • Voice VLANConfigures an auxiliary VLAN path with QoS markings to prioritize IP telephony traffic.
  • Access PortTransmits traffic for a single assigned VLAN without attaching 802.1Q frame headers.
  • Trunk PortMultiplexes traffic from multiple VLANs across a single physical switch link using 802.1Q tagging.
  • Broadcast Storm ControlPrevents network performance degradation by dropping excessive Layer 2 broadcast frames exceeding defined interface thresholds.

Answer

Voice VLAN matches with configuring an auxiliary VLAN path with QoS markings; Access Port matches with transmitting traffic for a single assigned VLAN without 802.1Q headers; Trunk Port matches with multiplexing traffic from multiple VLANs using 802.1Q tagging; Broadcast Storm Control matches with dropping excessive Layer 2 broadcast frames exceeding defined thresholds.
Each feature corresponds strictly to its operational role: Voice VLAN provides dedicated bandwidth and QoS prioritization for VoIP telephony; Access Port connects host endpoints inside a single untagged VLAN; Trunk Port multiplexes multi-VLAN frames across switches using 802.1Q header encapsulation; Broadcast Storm Control enforces bandwidth caps on broadcast traffic to prevent network disruption.

Step-by-Step Solution

1
Identify the primary purpose of Voice VLAN technology on enterprise access switches.
Voice VLAN delivers a secondary VLAN tag on a single port for IP phone traffic and applies Quality of Service (QoS) markings.
This separates voice traffic from workstation data traffic while maintaining call quality.
2
Differentiate between Access Port and Trunk Port forwarding behaviors.
Access ports process untagged frames for a single broadcast domain, whereas trunk ports aggregate multi-VLAN traffic across inter-switch links via 802.1Q headers.
End-user workstations require untagged access ports, while switch-to-switch links require trunks.
3
Determine the functional role of Broadcast Storm Control.
Storm control monitors ingress traffic levels and discards frames when broadcast, multicast, or unknown unicast traffic exceeds configured limits.
This mitigates Layer 2 loops or rogue device traffic from overwhelming switch CPU and link bandwidth.

Key Concept

Switch Port Modes, VLAN Allocation, and Traffic Control Features
Estimated Time:1m 30s
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Topics

Switching Concepts and VLANs

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